论文部分内容阅读
溜砂坡是一种较为严重的特殊山地灾害,属于斜坡重力侵蚀的特殊类型,常对公路、铁路等线路工程构成严重的危害。分析了溜砂坡的形成过程和砂粒在坡面滑动时的特征,推导了砂粒起动的临界条件,得出砂粒的起动受控于砂坡的天然休止角。以川藏公路中坝段K 3930+320~K 3930+800溜砂坡为例,通过室内试验研究了砂粒起动条件、砂粒含水量和砂粒粒径对溜砂坡休止角的影响。在此基础上,提出了控制砂源区、改变砂坡坡度以及固砂护坡技术等防治对策。
Sliding sand slope is a kind of special special mountain disaster, which belongs to a special type of slope gravity erosion, which often poses a serious hazard to highway, railway and other line projects. The forming process of slippery slope and the characteristics of sand when sliding on the slope are analyzed. The critical condition of grit initiation is deduced. It is concluded that the start of grit is controlled by the natural angle of repose of sand slope. Taking K 3930 + 320 ~ K 3930 + 800 slippery slope of Zhongba section of Sichuan-Tibet Highway as an example, the influence of grit start-up conditions, grit water content and grit size on the angle of repose of slip-sand was studied by laboratory tests. On this basis, the control measures such as controlling the sand source area, changing the slope of the sand slope and using the technology of sand stabilization and slope protection are put forward.